package com.example.galerija;

import android.app.Activity;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

import com.example.database.Group;
import com.example.database.RootProvider;
import com.example.database.Saldejums;

/**
 * A list fragment representing a list of Saldejums. This fragment also supports
 * tablet devices by allowing list items to be given an 'activated' state upon
 * selection. This helps indicate which item is currently being viewed in a
 * {@link SaldejumsDetailFragment}.
 * <p>
 * Activities containing this fragment MUST implement the {@link Callbacks}
 * interface.
 */
public class SaldejumsListFragment extends ListFragment {

	/**
	 * The serialization (saved instance state) Bundle key representing the
	 * activated item position. Only used on tablets.
	 */
	private static final String STATE_ACTIVATED_POSITION = "activated_position";

	/**
	 * The fragment's current callback object, which is notified of list item
	 * clicks.
	 */
	private Callbacks mCallbacks = sDummyCallbacks;

	/**
	 * The current activated item position. Only used on tablets.
	 */
	private int mActivatedPosition = ListView.INVALID_POSITION;

	/**
	 * A callback interface that all activities containing this fragment must
	 * implement. This mechanism allows activities to be notified of item
	 * selections.
	 */
	public interface Callbacks {
		/**
		 * Callback for when an item has been selected.
		 */
		public void onItemSelected(long l);
	}

	/**
	 * A dummy implementation of the {@link Callbacks} interface that does
	 * nothing. Used only when this fragment is not attached to an activity.
	 */
	private static Callbacks sDummyCallbacks = new Callbacks() {
		@Override
		public void onItemSelected(long id) {
		}
	};

	/**
	 * Mandatory empty constructor for the fragment manager to instantiate the
	 * fragment (e.g. upon screen orientation changes).
	 */
	public SaldejumsListFragment() {
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setListAdapter(new SimpleCursorAdapter(getActivity(),
				R.layout.saldejums_listitem, null, new String[] {
			/*			
			Saldejums.COL_ITEM_CAT_CODE,Saldejums.COL_PRODUCT_GROUP_CODE, Saldejums.COL_ITEM_CODE, 
						Saldejums.COL_DESCRIPTION_LV,
						*/
						Group.COL_PRODUCT_GROUP_CODE, Group.COL_DESCRIPTION_LV }, 
					//Show me group code
						//	new int[] {  R.id.cardIceGroupCode, R.id.cardGroupCodeDescription }, 0));
						new int[] {  R.id.cardIceGroupCode, R.id.cardGroupCodeDescription }, 0));
		
		
		// Load the content
		getLoaderManager().initLoader(0, null, new LoaderCallbacks<Cursor>() {
			@Override
			public Loader<Cursor> onCreateLoader(int id, Bundle args) {
				return new CursorLoader(getActivity(), 
				
				//		RootProvider.URI_SALDEJUMS, Saldejums.FIELDS, null, null, null
						RootProvider.URI_GROUPS, Group.FIELDS, null, null, null
						);
			}

			@Override
			public void onLoadFinished(Loader<Cursor> loader, Cursor c) {
				((SimpleCursorAdapter) getListAdapter()).swapCursor(c);
			}

			@Override
			public void onLoaderReset(Loader<Cursor> arg0) {
				((SimpleCursorAdapter) getListAdapter()).swapCursor(null);
			}
		});
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		return inflater.inflate(R.layout.fragment_saldejums_list, null);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);

		// Restore the previously serialized activated item position.
		if (savedInstanceState != null
				&& savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) {
			setActivatedPosition(savedInstanceState
					.getInt(STATE_ACTIVATED_POSITION));
		}
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);

		// Activities containing this fragment must implement its callbacks.
		if (!(activity instanceof Callbacks)) {
			throw new IllegalStateException(
					"Activity must implement fragment's callbacks.");
		}

		mCallbacks = (Callbacks) activity;
	}

	@Override
	public void onDetach() {
		super.onDetach();

		// Reset the active callbacks interface to the dummy implementation.
		mCallbacks = sDummyCallbacks;
	}

	@Override
	public void onListItemClick(ListView listView, View view, int position,
			long id) {
		super.onListItemClick(listView, view, position, id);

		// Notify the active callbacks interface (the activity, if the
		// fragment is attached to one) that an item has been selected.
		mCallbacks.onItemSelected(getListAdapter().getItemId(position));
		Log.w("Message", "onItemSelected Group ID " +id);
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		if (mActivatedPosition != ListView.INVALID_POSITION) {
			// Serialize and persist the activated item position.
			outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition);
		}
	}

	/**
	 * Turns on activate-on-click mode. When this mode is on, list items will be
	 * given the 'activated' state when touched.
	 */
	public void setActivateOnItemClick(boolean activateOnItemClick) {
		// When setting CHOICE_MODE_SINGLE, ListView will automatically
		// give items the 'activated' state when touched.
		getListView().setChoiceMode(
				activateOnItemClick ? ListView.CHOICE_MODE_SINGLE
						: ListView.CHOICE_MODE_NONE);
	}

	private void setActivatedPosition(int position) {
		if (position == ListView.INVALID_POSITION) {
			getListView().setItemChecked(mActivatedPosition, false);
		} else {
			getListView().setItemChecked(position, true);
		}

		mActivatedPosition = position;
	}
}
